441 Pen Through Anything
You remove an expensive looking designer type pen. You then borrow a bill from a spectator, and proceed to push the pen through the center of the bill. Once the pen is through the bill, you can show the pen and the bill from all angles. You then take the pen and proceed to rip it through the bill. They can actually hear the bill rip. Now slowly and fairly you rub your fingers over the torn parts, and the bill is now restored. Everything can be examined.